Jack rack insert



FIG. 1 is a top perspective view of the jack rack insert embodied in the present invention;

FIG. 2 is a front view of the jack rack insert from FIG. 1;

FIG. 3 is a right side view of the jack rack insert from FIG. 1;

FIG. 4 is a back view of the jack rack insert from FIG. 1;

FIG. 5 is a left side view of the jack rack insert from FIG. 1;

FIG. 6 is a bottom view of the jack rack insert of FIG. 1; and,

FIG. 7 is a top view of the jack rack insert of FIG. 1. 

CLAIM The ornamental design for a jack rack insert, as shown and described. 